1.85772618 rounded to the nearest hundred-thousandth is

1.85773

Explanation:

The hundred-thousandth is the 5th digit of the decimal place so in this case it is 2.

Because there is a 6 after the 2 we round up to 3

So the hundred-thousandth answer would be 1.85773

1.85772618 written to the the nearest hundred-thousand would be 1.85773.

To solve:

When rounding, you have to remember that when the number is 5 or less, the number (for example) : 2 would be rounded to 2. If it's greater than 5 or more, 2 would be rounded to 3.

So let's start from 8 to 2. 8 to 1 is going to turn to 2. 2 to 6 is going to turn to 6. Finally, 6 to 2 would turn to 3. So, the answer is 1.85773.

If you need a further explanation, read here:

If that digit is less than 5, do not change the rounding digit but drop all digits to the right of it. If that digit is greater than or equal to five, add one to the rounding digit and drop all digits to the right of it.